The new output was discovered by Inside Facebook but has not rolled out to all users at this time. Typically when Facebook rolls out a new feature it beta tests changes for a small subset of users then pushes the change to all of its 900+ million users over a short time period.
The new design includes the page’s cover photo, added About section information and even new icons for a page’s photos, fan base details, etc.
Mobile users will also notice a larger “Like” button that spans across the width of the screen. Pages with a “message” button however have a smaller like button.
By adding a cover photo and page descriptions to mobile output users are expected to gather a more clear understanding of what a page is about, while the larger Like button Facebook believes will lead to higher engagement rates and ultimately better mobile device revenues.
The cover photos via the mobile app continue to maintain the same aspect ratio as found on the desktop version of Facebook pages, thus ensuring proper output for mobile viewers. Facebook does warn that cover and profile images do not align in the same way so clever alignment of those photos will not translate on mobile Timeline outputs.